Ernesto F. Galvão

Welcome!

I lead the Quantum and Linear-Optical Computation research group at the International Iberian Nanotechnology Laboratory (INL) in Braga, Portugal. I am also on leave from an associate professorship at the Instituto de Física of Universidade Federal Fluminense, in Niterói, Brazil.

Click here for a version of these pages in Portuguese.

Research

My main research is in the areas of quantum information and computation, and foundations of quantum mechanics. Some research interests and paper highlights:

• Quantum computation using photonic chips

  • • Experimental certification of contextuality, coherence, and dimension in a programmable universal photonic processor. Sci. Adv. 9, eadj4249 (2023).

    • Photonic implementation of boson sampling: a review. Advanced Photonics 1 (3), 034001 (2019).

    • Witnessing genuine multiphoton indistinguishability. Phys. Rev. Lett. 122, 063602 (2019).

    • Experimental scattershot boson sampling. Sci. Adv. 1 (3), e1400255 (2015).

    • Experimental validation of photonic boson sampling. Nature Photonics 8, 615–620 (2014). 

    • General rules for bosonic bunching in multimode interferometers. Phys. Rev. Lett. 111, 130503 (2013).

    • Integrated multimode interferometers with arbitrary designs for photonic boson sampling. Nature Photonics 7, 545–549 (2013).

• Measurement-based and topological quantum computation

  • • Quantum circuit compilation and hybrid computation using Pauli-based computation. Quantum 7, 1126 (2023). 

    • Quantum computation from fermionic anyons on a 1D lattice. Phys. Rev. A 99, 062335 (2019).

    • Reliable computation from contextual correlations. Phys. Rev. A 96, 062305 (2017). 

    • Closed timelike curves in measurement-based quantum computation. Phys. Rev. A 83, 012316 (2011). 

• Analogues of quantum contextuality/non-locality and quantum information protocols in classical optics

  • • Astigmatic tomography of orbital angular momentum superpositions. Phys. Rev. A 99, 043820 (2019).

    • Tripartite nonseparability in classical optics. Optics Letters 41 (24), 5797 (2016). 

    • Spin-orbit laser mode transfer via a classical analogue of quantum teleportation. J. Phys. B: At. Mol. Opt. Phys. 49, 055501 (2016). 

• Non-locality, contextuality and other foundational issues in quantum theory and quantum computation

  • • Simple proof that anomalous weak values require coherence. Phys. Rev. A 108, L040202 (2023).

    • Inequalities witnessing coherence, nonlocality, and contextuality. Phys. Rev. A 109, 032220 (2024). 

    • Measuring relational information between quantum states, and applications. New J. Phys. 26 013053 (2024).

    • Quantum and classical bounds for two-state overlaps. Phys. Rev. A 101, 062110 (2020).

A (near-)complete list of my scientific publications can be found here; alternatively, check out my Google Scholar page. Visit also the site of my research group at INL.

My group is currently funded by FCT and by the EC via HE project FoQaCiA,  FET-OPEN project PHOQUSING, the ERC Advanced Grant QU-BOSS, and HE project EPIQUE.

Academic supervision

I currently co-supervise:

• PhD student Carlos Fernandes (jointly with Nuno Peres);

• PhD student Michael Oliveira (jointly with Luís Soares Barbosa);

• PhD student Filipa Peres (jointly with João Lopes dos Santos);

• PhD student Rafael Wagner (jointly with Rui S. Barbosa and Mikhail Vasilevskiy);

• PhD student Anita Camillini (jointly with Michael Belsley);

• PhD student Antonio Molero (jointly with Luís S. Barbosa and Raffaele Santagati);

• PhD student Mafalda Francisco Ramôa da Costa Alves (jointly with Luís Paulo Santos);

• PhD student Alexandra Francisco Ramôa da Costa Alves (jointly with Luís Paulo Santos);

• Master's degree student Vitória Sousa (jointly with Luís Paulo Santos).

I have supervised 3 completed PhD projects, 5 MSc projects, and eight undergraduate research projects.

Alumni:

Allan David Cony Tosta - PhD 2021, currently a postdoc at Leandro Aolita's group.

Daniel Jost Brod - PhD 2014, was a postdoctoral fellow at Perimeter Institute, currently a professor at the Physics Department of UFF.

Raphael Dias da Silva - PhD 2013, currently a tech entrepreneur.

Etc

• My CV.

• Press coverage.

• Colloquium "Vantagem quântica computacional" (in Portuguese), given on 19/02/2021 to the Physics Department of UFMG.

• Short course "Introduction to quantum computation and simulability", given in October 2018 at ICTP/SAIFR - IFT/Unesp (São Paulo), jointly with Daniel Brod (IF-UFF) and Leandro Aolita (ICTP/SAIFR - UFRJ). Includes a page with links to related papers.

• Short course "Ingredients for universal quantum computation", given at the V Quantum Information School - Paraty 2015. There you can find slides and links to the recorded lectures and to relevant papers.

• Here's a list of introductory papers and online material on some research topics I'm interested in. This is a list of resources for interested students who want to learn more about these topics.

Contact

Ernesto F. Galvão

INL- International Iberian Nanotechnology Laboratory 

Avenida Mestre José Veiga s/n, 4715-330 Braga, Portugal 

e-mail: ernesto.galvao at inl.int